Exhibit:
Please study the exhibit carefully. What does the STATUS=ACTIVE refer to in the output of the show frame-relay pvc command shown above?
A.The PVC is experiencing congestion.
B.The Frame Relay switch is correctly programmed with the DLCI and is operational.
C.The router is actively broadcasting to establish a link to the Frame Relay switch.
D.The router is connected to the local Frame Relay switch, but not to the far end device.
E.None of the above
Answer: B Explanation:
The Frame Relay switch uses LMI to report the status of configured PVCs. The three possible PVC states are as follows:
Active state - Indicates that the connection is active and that routers can exchange data. This is the state of an operational PVC.
Inactive state - Indicates that the local connection to the Frame Relay switch is working, but the remote router connection to the Frame Relay switch is not working.
Deleted state - Indicates that no LMI is being received from the Frame Relay switch, or that there is no service between the CPE router and Frame Relay switch.
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QUESTION NO: 25
Study the output script and the network topology exhibit below:
TestKing1# show running-config
<some output text omitted>
interface serial0/0 bandwidth 64
ip address 172.16.100.2 255.255.0.0 encapsulation frame-relay
frame-relay map ip 172.16.100.1 100 broadcast
The Router TestKing1 in Hong Kong is connected to the router TestKing2 in Tokyo via a new Frame Relay link. However, TestKing1 is unable to communicate with TestKing2. Based on the above output, what do you suspect as the underlying cause of this problem?
A.Bandwidth configuration incorrect
B.IP address not correct
C.Improper map statement
D.Improper LMI configuration
E.None of the above
Answer: C
Explanation: From looking at the diagram you can see that Hong Kong's DLCI is 100, while Tokyo's DLCI is 200.
The Frame Relay map command is an interface configuration mode command that statically defines a mapping between a network layer address and a DLCI.
Incorrect Answers:
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A.The bandwidth statement is not used by the routers at a physical or data link layer, so this statement will not have any impact on the function of the frame relay circuit.
B.We do not know what the IP address of the Tokyo side is, so this can not be assumed.
D.The default LMI type is Cisco, and since both routers in this network appear to be Cisco's, we can assume that this is acceptable.
QUESTION NO: 26
While troubleshooting an issue with your frame relay network, you issue the "show frame pvc" command as shown in the exhibit below:
You're a network administrator at a TestKing branch office, that's connected to the central headquarters by means of Frame Relay. You've been getting complaints that the connection has suddenly become slow, so you make the assumption that there's too much traffic going through the link.
Taking into consideration the above output from the 'show frame relay pvc' command; which command output value is indicating that there's congestion between the local router and the corporate site?
A. in DE packets 0
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B.last time PVC status changed 00:25:40
C.in BECN packets 192
D.DLCI = 100
E.in FECN packets 147
Answer: C Explanation:
BECN stands for Backward Explicit Congestion Notification. The BECN tells the transmitting device that the Frame Relay network is congested and that it should "back off" to allow better throughput. BECN and FECN go hand to hand together, but since the question specifically asks for what's indicating congestion between the local router and corporate site, BECN is correct.
QUESTION NO: 27
You are attempting to troubleshoot a frame relay problem you are having within the Testking network, but you are unsure where to start. You begin by entering the command:
Router# show frame-relay ?
Which three options will you be prompted for? (Select three answers choices)
A.dlci
B.clients
C.pvc
D.neighbors
E.lmi
F.map
Answer: C, E, F Explanation:
The valid options for, 'show frame-relay' are: show frame-relay map, show frame-relay lmi, & show frame-relay pvc. In the Cisco IOS, if you don't type in a command specific enough, it will prompt you to select an option.
Incorrect Answers:
A, B, D. Show frame-relay dlci, show frame-relay clients, and show frame-relay neighbors are all invalid commands.
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QUESTION NO: 28
Exhibit:
In the example above, A Testking router interface is being configured for Frame Relay. However, as the exhibit shows, the router will not accept the command to configure the LMI type. What is the problem?
A.The interface does not support Frame Relay connections.
B.The interface does not have an IP address assigned to it yet.
C.The interface requires that the no shutdown command be configured first.
D.The interface requires that the encapsulation frame-relay command be configured first.
Answer: D Explanation:
Before entering LMI type in interface, you should type the encapsulation frame-relay command. By default, serial interfaces use HDLC encapsulation, where the LMI type is not a configurable option as HDLC does not understand the concept of LMI.
See the sample Configuration steps: Router(config-if)#encapsulation frame-relay {cisco | ietf} Router(config-if)#frame-relay lmi-type {ansi | cisco | q933a}
QUESTION NO: 29
Refer to the TestKing frame relay exhibit below:
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In this frame relay network, which IP addresses would be assigned to the TK1, TK2, and TK3 interfaces when using point-to-point PVCs?
A.DLCI 16: 192.168.10.1 /24 DLCI 17: 192.168.10.1 /24 DLCI 99: 192.168.10.2 /24 DLCI 28: 192.168.10.3 /24
B.DLCI 16: 192.168.10.1 /24 DLCI 17: 192.168.11.1 /24 DLCI 99: 192.168.12.1 /24 DLCI 28: 192.168.13.1 /24
C.DLCI 16: 192.168.10.1 /24 DLCI 17: 192.168.10.2 /24 DLCI 99: 192.168.10.3 /24 DLCI 28: 192.168.10.4 /24
D.DLCI 16: 192.168.10.1 /24 DLCI 17: 192.168.11.1 /24 DLCI 99: 192.168.10.2 /24 DLCI 28: 192.168.11.2 /24
Answer: D
Explanation:
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With Point to point PVC's, two subinterfaces would be created on router TK2, one for each connection to the remote locations. In this network, the connection to TK1 would require one IP subnet, and the connection to router TK3 would require another. These two subnets must be separated, as each subinterface requires a distinct IP network. Only choice D correctly shows one IP subnet allocated to the TK1-TK2 network, and one for the TK2-TK3 connection.
Section 4: Troubleshoot WAN implementation issues (4 questions)
QUESTION NO: 1
What is the advantage of using a multipoint interface instead of point-to-point subinterfaces when configuring a Frame Relay hub in a hub-and-spoke topology?
A.It avoids split-horizon issues with distance vector routing protocols.
B.IP addresses can be conserved if VLSM is not being used for subnetting.
C.A multipoint interface offers greater security compared to point-to-point subinterface configurations.
D.The multiple IP network addresses required for a multipoint interface provide greater addressing flexibility over point-to-point configurations.
E.None of the above
Answer: B Explanation:
Frame Relay supports two types of interfaces: point-to-point and multipoint. The one you choose determines whether you need to use the configuration commands that ensure IP address to data-link connection identifier (DLCI) mappings. After configuring the PVC itself, you must tell the router which PVC to use in order to reach a specific destination. Let's look at these options:
1. Point-to-point subinterface - With point-to-point subinterfaces, each pair of routers has its own subnet. If you put the PVC on a point-to-point subinterface, the router assumes that there is only one point-to-point PVC configured on the subinterface. Therefore, any IP packets with a destination IP address in the same subnet are forwarded on this VC. This is the simplest way to configure the mapping and is therefore the recommended method. Use the
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frame-relay interface-dlci command to assign a DLCI to a specified Frame Relay subinterface.
2. Multipoint networks - Multipoint networks have three or more routers in the same subnet. If you put the PVC in a point-to-multipoint subinterface or in the main interface (which is multipoint by default), you need to either configure a static mapping or enable inverse Address Resolution Protocol (ARP) for dynamic mapping.
QUESTION NO: 2
Part of the TestKing network is shown below:
After the router interfaces shown in the diagram above have been configured, it is discovered that hosts in the Branch LAN cannot access the Internet.
Further testing reveals additional connectivity issues. What will fix this problem?
A.Change the address of the Branch router LAN interface.
B.Change the address of the Branch router WAN interface.
C.Change the subnet mask of the HQ router LAN interface.
D.Change the address of the HQ router LAN interface.
E.Change the address of the HQ router interface to the Internet.
F.Change the subnet mask of the HQ router interface to the Internet.
G.None of the above
Answer: B
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Explanation:
The serial line connection between the Branch office and the HG office should have interfaces that belong in the same subnet. Based on the diagram above, the WAN interface of the Branch router is configured with an IP address that is in a different IP network than the serial interface of the HG router. As it is set up currently, no traffic will pass from the Branch router to the HG until these two interfaces are in the same subnet.
QUESTION NO: 3
Two TestKing routers are connected as shown below:
TestKing1 command output exhibit:
The two TestKing routers shown above are the only Cisco devices on the network. The serial network between the two devices has a mask of 255.255.255.252 (/30). Given the output that is shown, what three statements are true of these devices? (Choose three)
A.The TestKing1 serial address is 10.1.1.1.
B.The CDP information was received on port Serial0/0 of the TestKing1 router.
C.The CDP information was sent by port Serial0/0 of the TestKing2 router.
D.The TestKing2 router is a Cisco 2610.
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E.The TestKing1 router is a Cisco 2610.
F.The TestKing1 serial address is 10.1.1.2.
G.CDP is not enabled on TestKing2
Answer: A, B, D
QUESTION NO: 4
A point to point leased line connecting routers TestKing1 and TestKing2 is installed as shown below:
The two serially connected routers can't communicate. Can you identify the fault on router TestKing2?
A.Link reliability is insufficient
B.IPCP is not open
C.Incorrect subnet mask
D.Incompatible encapsulation
E.Bandwidth allocation is too low
F.Incomplete IP address
G.None of the above
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